Well all right I was expecting it, and it was predictable, but it's what was implied by the events that grabs my interest the most.
Like Locke said to Walt way back in Season 1, backgammon is a game of white and black pieces, "good versus evil". He held up the pieces in the frame just to make that point.
The pieces are moving around the board, the game is on.
was desperately trying to atone for some bad things he had done. Any time a main character has a flashback, it deals with pivotal events in their lives. The black smoke/monster reflects
past deeds back to him. Everyone reflects on their lives and in some regard they are all being judged.
So one monster judges the right (the White) and one judges the wrong (the Black). Backgammon, an ancient game of the Gods, whomever they may be.
Dharma, as Alvar Hanso said during the Lost Experience, is the "One True Way" and now I think he means it, or else! The game is getting very interesting now, which piece is next to fall?